Car truck



Patented Aug. 2a, 1928.

UNITED STATES rafrsur 'orrics.

541mm. rmoorr nusn AND noon cmusrrax. LABSEN, or-conuiu'sus, onro, AS- sronons m m nucxmm srnar. casrnwos oomranr or conmus, 01110.

GAB TBIIGK.

has s and t e connectionof the bolster wit the vention is to Application filed September a, 1925. Serial ll'o. 54,299.

This invention rlates -to car trucks and a spring one row or line of springs'will ial reference to the spring su port side frame. The principal object of the in provide novel means for effectually inter ocking the bolster and the side frame, and to equalize the stresses on ."the ends of the group of-springs. Other ob- I 'jects of'the invention will ap' ar incidental lustrate one embo ly in the course of the following description,

and the invention resides 'in certain novel features which will be particularly pointed out in the. appended claims.

In the accompan g drawings, which il lment of the invention-- Figure 1 is a side elevation of a portion a truck having the improved construction; 7

Figure 2 IS. a plan view ofi-the same; v Figure 3 is a transverse section with parts in elevation and parts brokeii away.

The truck consists essentially of a side frame 1, a bolster 2, and springs 3 carried by the side frame and supporting" the end of the bolster. The side frame, of con is carried bythe axles of the car wheels an itis preferably of that type in which the journal boxes 4 are integral with the frame.

The side frame is formed centrally with an opening 5 to admit the end of the bolster and the bottom or floor of this opening is expanded transversely to form, a springeat 6 uplon which rests an end of a spring plank ich extends between the two side frames .Of the truck. The plank 7 is" of-th usual channel formation with vertical side flanges 8 but the flanges terminate at and abut the inner side of the side frame, this construc-e tion aiding keeping the side frames in arallelism. When rounding a curve; there is a concentration of stress in a plane passing acrossthe ends .of the flanges, and to overcome this strainlugs 9 are provided on the side frame so located as to snugly bear against the flanges 8, the plank being held down onthespring seat by the load transmitted through the bolster and the sp It is now general practice to arrange t e springs in rectangular relation whichan rangement requires a rather wide and weak spring seat and a {corresponding width is necessary in the bolster and the opening through the side framefIn the present truck, as indicated in Figure 2,-the springs are arranged in staggered relation so that portion of. the

partlyenter the space between two springs in an duees the width adjacent cooperating parts, the spread of the wheel base being-reduced by the same adjacent row; This arrangement re-.

of the spring' group and amount that the width of the openingin the j the lengthnds of the spring group. The invention includes means for e The end of. the ho nose 10 whichualizing'this strain.

ster is formed into 9. projects into the upper end opening 5 in'the side frame, and on the sides of the bolstenare lugs or pro ections 11 which abut the inner side of the s de frame and limit the extent to which the frame may be inserted over the bolster.

width than the body The nose 10 is of less of the bolster and the lugs 11 terminate short of the bottom of the body, inwardly extend- .mg recesses 12 being thereby produced on the sides of the bolster, as shown in Figure 3; In the underside of the nose, near the end thereof, is a concave seat or shallow groove 13 which is adapted to rest upon a convex saddle 14 formed on the bolster spring seat 15 which forms thh, floor of a hood or.hoxlike equalizer 16. This boxlike equalizer or hood is closed at its outer end and has an open rear top portion, shown at 1'1, toaccommodate the upper portion of the nose, 'while its sides are so shaped as to abut the projections 11 on. the bolster and present tongues 18 to fit within the recesses 12 in the bolster. Near the outer closed end of the hood, lugs or projections 19 are formed on the sides thereof to abut the outer side frame. After the side frameihas been fitted over the end ofthejbolster and the springs placed inv position,-' the hood or equalizer is ice 7 inserted to engage around the bolster end and bring the saddle directly under the seat 13. The load on the bolster and the springs will hold the saddle and the bolster together while the lugs 11 and 19 engaging-the side frame will interlock-the bolster therewith. Obviously, the hood or equalizer. will retain its horizontal position notwithstanding rocking of the bolster and the strain upon the opposite ends of the group of springs will be kept approximately even at all times.

With this construction, the side frame may be easily removed from the truck if such work should be necessary. The bolster is first lifted from the springs to permit the hood 16 to be disengaged from the bolster and withdrawn. The bolster is then lowered to again rest on the springs, whereupon if the spring plank 7 with the superimpose springs and bolsterv be raised, the entire side frame will be free to be moved sidewise clear of the rest of the truck. 1

Having fully described our invention what we claim as new and desire to secure by Letters-Patent, is

1. In a car truck, the combination of a side frame having an opening therethrough, the floor of the opening being laterally expanded and constituting a spring seat, a spring plank having its end resting on the spring seat, side flanges on the spring plank terminating at and abutting the side frame, springs resting on the spring plank, projections on the side frame bearing against the flanges on the spring plank, a bolster having its end extending into the side frame over the springs, and an equalizer between the bolster and the springs.

2. In a car truck, he combination of a side frame having an opening therethrough,

a group of springs carried by the side frame, a bolster projecting into the opening in the side frame over the springs, a hood housing the end of the bolster and resting on the springs, projections on. the sides of the.

bolster abutting the inner side of the side frame, and prqections on thehood abutting pro ections m engagement with e bolster. 4

the outer side of the side frame, the sides of the hood at the inner end thereof abutting the projections on the bolster and havin tongues extending below and be ond sai 3. In a car truck, the combination of a sideframe, a group of springs carried by the side frame, a hood resting on the s rings and having tongues extending from t e inner ends of its side walls, a saddle on the floor of the hood, projections on the sides of the hood abuttin the-outer side of the side frame, and a bo ster having a reduced and forming a nose to engage within the hood and having a seat in its under side resting on the saddle, the bolster having projections on its sides abutting the inner side of the side frame and the end of the hood and having recesses below said projections to receive the tongues on the hood.

4. In a car truck the combination of cast integral side frames comprising upper and lower members, columns connecting the two, a bolster opening, a bolster in the opening, means between the holster and the springs interlocking with the bolster for equalizing the strains on the ends of the group of springs, stops acting against the outer sides of the columns cast integral with said equalizin means and stops cast integral with the olster and acting against the inner sides of the columns, whereby under normal conditions the frames are prevented from displacement with respect to each other, but may be withdrawn without requiring material disturbance of the springs.

5. As a new article of manufacture, a truck bolster having integral inside bolster stops and separate outside bolster stops adapted to interlock with the bolster, said separate stops providing means above the springs for equalizing the compression of individual springs in each group of springs at opposite ends of the bolster.

- In testimony whereof, we have signed this specification.

SAMUEL PRESCOTT BUSH. JACOB CHRISTIAN LARSEN. 

